*{margin: 0; padding: 0;text-decoration: none;box-sizing: border-box;}
.left{float: left;}
.right{float: right;}
li{list-style: none;}
body{background: rgb(255,255,255);width: 100%;height: 100%;min-width: 1300px;}
/* 页面不能选中 */
html{-webkit-touch-callout: none;-webkit-user-select: none;-moz-user-select: none;-ms-user-select: none;user-select: none;}